1 files changed, 49 insertions, 0 deletions
diff --git a/qemu/tests/tcg/cris/check_lz.c b/qemu/tests/tcg/cris/check_lz.c
new file mode 100644
index 000000000..69c2e6d4e
--- /dev/null
+++ b/qemu/tests/tcg/cris/check_lz.c
@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include "sys.h"
+
+static inline int cris_lz(int x)
+{
+	int r;
+	asm ("lz\t%1, %0\n" : "=r" (r) : "r" (x));
+	return r;
+}
+
+void check_lz(void)
+{
+	int i;
+
+	if (cris_lz(0) != 32)
+		err();
+	if (cris_lz(1) != 31)
+		err();
+	if (cris_lz(2) != 30)
+		err();
+	if (cris_lz(4) != 29)
+		err();
+	if (cris_lz(8) != 28)
+		err();
+
+	/* try all positions with a single bit.  */
+	for (i = 1; i < 32; i++) {
+		if (cris_lz(1 << (i-1)) != (32 - i))
+			err();
+	}
+
+	/* try all positions with all bits.  */
+	for (i = 1; i < 32; i++) {
+		/* split up this computation to clarify it.  */
+		uint32_t val;
+		val = (unsigned int)-1 >> (32 - i);
+		if (cris_lz(val) != (32 - i))
+			err();
+	}
+}
+
+int main(void)
+{
+	check_lz();
+	pass();
+	exit(0);
+}